Caterpillars or larva can cause extensive damage to arhar crops, decreasing yield and harming the quality of the crops. Therefore, it is crucial to take appropriate control measures to prevent the damaging effects of caterpillars on arhar crops. Here are some control measures to tackle caterpillars in arhar crops:
1. Crop rotation: Crop rotation is a simple but effective way of preventing the buildup of pests in the soil. It reduces the chances of pests and diseases by changing the location of the crop every season. Rotation with other crops can help break the life cycle of pests.
2. Biopesticides: Biopesticides, such as Bacillus thuringiensis (BT), are an eco-friendly and effective way to control caterpillars. It is available in liquid or powder form, and it works by causing stomach poison to the caterpillar, causing the death of the pest within a few days.
3. Cultural practices: Proper cultural practices can prevent the growth and development of pests. These cultural practices include proper spacing of the plants, timely weeding, and adequate irrigation, which can reduce the stress on the plants and make them less attractive to pests.
4. Chemical pesticides: There are various chemical pesticides available which can control caterpillars. However, their use should be limited as they can cause harm to non-target organisms and also contaminate the soil and water.
5. Manual removal: Another non-toxic method for controlling caterpillar populations is handpicking or pruning. This should be done during early morning or late evening when the pests are most active.
6. Neem-based products: Neem-based products can act against leaf-eating caterpillars. The use of products like neem oil on arhar crop can disrupt the feeding behavior of caterpillars making them less attractive to pests.
In conclusion, caterpillars can cause considerable damage to arhar crops leading to reduced yields and poorer quality produce. A combination of these control measures could be employed to effectively fight and manage caterpillar attacks. However, it should be noted that some methods may require repeated application for optimal effect. Consulting with an experienced agronomist or extension personnel can provide further guidance on which control measure is most effective for your location and particular situation.